\centering
\begin{tabular}{ccc}
  \includegraphics[width=60pt,angle=90]{mini.pdf} &
  \includegraphics[width=60pt,angle=180]{mini.pdf} &
  \includegraphics[width=60pt,angle=270]{mini.pdf} \\
  \includegraphics[width=60pt,angle=90,origin=c]{mini.pdf} &
  \includegraphics[width=60pt,angle=180,origin=c]{mini.pdf} \rule{0pt}{80pt} &
  \includegraphics[width=60pt,angle=270,origin=c]{mini.pdf} \\
\end{tabular}
